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(No Model.)

W. D. P JARVIS GAR VENTILATING APPARATUS.

Patented 1887.

Wi'bzesses:

llsiiTnn STATES ATENT Trice \VILLIAM I). 1'. JARVIS, OF PHILIPPI, ESTVIRGINIA, ASSIGNOR TO HIM SELF AND LLOYD D. ROBINSON, OF SAME PLACE.

CAR-VENTiL-ATlNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 359,975, dated March22, 1887.

Application filed August 31,1886. Serial No. 212.319. (X0 model.)

.To all whom 2'6 may concern.-

Be it known that I, \VILLIAM D. F. J anvrs, of Philippi, in the countyof Barbour and State of V est Virginia, have invented certain new anduseful Improvements in Means for Preventl ing Cinders and Dust fromEntering Cars; and I do hereby declare that the following is a'full,clear, and exact description thereof, reference being bad to theaccompanying drawings, and to the let-tcrsolrelcrence marked thereon,which form part of this specification, in which- Fign re 1 is a sideview of arailroad-car body having my invention applied thereto. Fig. 2is a central vertical longitudinal section, partly broken away, of thesame, showing theintcrior arrangement of the tubing. Fig. 3 is acrossscction ofhig. 1, showing the connection of the tubing or pipingwith the air-directors F. Fig. 4 is a sectional detail of the same.

This invention relates to improvements in smoke and dust excludingapparatus for cars, being especially designed for use on railroadcoaches; and it consists in the novel construction of the air-directors,hereinafter described, and arrangement of parts, as will be fully uirderstood from the following description, when taken in connection withthe accompanying drawings, and specifically designated in the claim.

In the drawings, A designates the body of a railway-car, which may be ofusual ordinary construction. To the bottom of body A, underneath thefloor thereof, I secure in suitable manner an air drum or receiver, 0,of proper size. This receiver may be placed either centrally of thebottom, as shown, or in other con venient situation, as may be desired.

B designates pipes running,respectively, from each end of receiver 0 tothe ends of the carbody. These pipes are provided at their ends withsuitable valved flexible coupling-tubes, I), which may be similar to thecouplings used in the present system of air-brakes.

D D designate pipes extending from drum 0, at right angles to pipes 13,beneath the floor of the car, to the sides thereof, where they bendupward into or are connected with vertical pipes d, which risevertically within the side walls of the car,or on the inside faces ofthese walls,to a point above the tops of the windows of relatively-smalldiameter to pipe E, with which each joint 0 connects and opens, thejoints 6 passing through the side walls of body A, as shown.

F F designate the air-jet directors, into which the outer ends of pipes0 open, and they are made as follows: Each director F is formed orstamped from a sheet of springy metal, or of rubber, and is rounded incross-section and semi-tubular in longitudinal section, as shown inFigs. 3 and 4, its ends being closed and 7 properly flanged, as well asits side edges, so that it can be secured in place by suitablefastenings, such as screws. Each director F has its longitudinalsemicircular portion slitted,or provided with a narrow aperture, f, as 75 shown. The directors F shouldbe of sullicient length to havetheirslits f correspond in length to the height of the windows, betweenwhich the jet-directors are secured by the described means, one directorF being placed between each pair of windows,on the outside of thecarbody,and one director at the outer side of each end window of thecar, as shown, with the slits f outward and parallel to the verticalsides of the windows. the jet-directors F made of springy material, asdescribed, is to regulate the passage of air through the slits, ashereinafter described, so that when air is forced into the directorsunder heavy pressure the slits will widen, and when 0 under lesspressure they will contract, so that the force of the jet of airescaping from the slits in the directors will be about equal invelocity,though not in quantity, notwithstanding the variations ofpressure in the direct- 5 ors F.

The manner of supplying air to the directors F is as follows: The car A,forming one of a series of similarly-equipped cars in a train,

and connected therewith by the flexible conp- 100 The object of havinglings b, so that all the receivers O and di rectors F will receive,andhave a corresponding air-pressure. The front car of the series isconnected by its flexible coupling to an air-com,

densing or air-compressing engine, preferably similar to thepumping-engines used in connection with the WVestinghouse air-brake, andunder control of the engineer. This pump being started, the compressedair will flow through the tubes or pipes B to the receivers O in eachcar, whence it will be conducted through pipes D and its bend orconnection (2 to the delivering-pipes E, from which it is deliveredthrough joints 6 into the jet-directors F, from which it escapes throughthe slits f in thin sheets at right angles to the car-body. Now when thecars are in motion, the sheets of air escaping through the directors F,as described, will be curved backward by the currents oflair created bythe motion of the train; but the pressure will be such that the jetswill extend several inches from the sides of the car,

and any ciuders from the engine or dust from theroad-bed will be blownoutward by them from the windows and prevented from entering the samewhile the windows are open and theapparatus is working, asdescribed,.thus

v adding greatly to the comfort of passengers.

The means for supplying compressed air to the receivers O and thence tothe directors, as described, may be varied, the means described, thoughpreferable, not being an essential element of the invention, which isprincipallyin the novel construction of the jet-directors F and theirconnections with the receivers.

I am aware that devices have been employed for directing currents of airfrom theisides of the car, between the windows thereof, to prevent thepassage or entrance of dust and smoke therein; and I am also aware thatven tilating devices have been employed having an air-receiver locatedbeneath the car-floor.

Therefore I do not claim such devices, broadly; but

What I do claim as new is In a railroad-ear, the combination; of thevertical jet-directors F, made of flexible material and provided withthe vertical slits f, as i tops of the car-windows,on the insidethereof,

and communicating with the directors F by suitable joints, 6,allsubstantially in the manner and for the purpose specified.

In testimony that I ielaim the foregoing as my own I affix my signaturein presence oftwo witnesses.

W. D. J ARVIS;

\Vitnesses:

W. P. SCOTT, GRAN. E. TAFT.

